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FIX: force blended transforms with data to be in data space #17017

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Merged
merged 2 commits into from
Apr 3, 2020
Merged

FIX: force blended transforms with data to be in data space #17017

merged 2 commits into from
Apr 3, 2020

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jklymak
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@jklymak jklymak commented Apr 3, 2020 •
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PR Summary

Closes #17016
(Maybe?)

This is a very naive approach. Needs tests so we don't break it again. Not sure what the correct thing to do for blended transforms is

import numpy as np
import matplotlib as mpl
import matplotlib.transforms as tx
from matplotlib.collections import LineCollection
import matplotlib.pyplot as plt

a = [1, 2, 4]
height = .2

xy_pairs = np.column_stack([np.repeat(a, 2), np.tile([0, height], len(a))])
line_segs = xy_pairs.reshape([len(a), 2, 2])

f, ax = plt.subplots()
trans = tx.blended_transform_factory(ax.transData, ax.transAxes)
ax.add_collection(LineCollection(line_segs, transform=trans))
ax.autoscale_view(scalex=True, scaley=False)

Now returns

fix

PR Checklist

  • Has Pytest style unit tests
  • Code is Flake 8 compliant
  • New features are documented, with examples if plot related
  • Documentation is sphinx and numpydoc compliant
  • Added an entry to doc/users/next_whats_new/ if major new feature (follow instructions in README.rst there)
  • Documented in doc/api/api_changes.rst if API changed in a backward-incompatible way

@jklymak jklymak added this to the v3.2.2 milestone Apr 3, 2020
@jklymak jklymak requested a review from anntzer April 3, 2020 18:14
This was referenced Apr 3, 2020
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@jklymak jklymak force-pushed the fix-blended-transform branch from 593e41f to bceaab2 Compare April 3, 2020 18:57
@anntzer
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anntzer commented Apr 3, 2020

I think the correct thing is "just" to autoscale only along dimensions that contains_branch_separately(transData), but not others? Not saying it's so easy :/

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Basic approach lgtm, perhaps needs to be noted in whatsnew?

@tacaswell
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Not sure this needs a whats_new as it is fixing a regression.

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tacaswell approved these changes Apr 3, 2020
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Anyone can merge on CI green.

@tacaswell tacaswell added the Release critical For bugs that make the library unusable (segfaults, incorrect plots, etc) and major regressions. label Apr 3, 2020
@jklymak jklymak changed the title FIX: force bended transforms with data to be in data space FIX: force blended transforms with data to be in data space Apr 3, 2020
@jklymak jklymak force-pushed the fix-blended-transform branch from bceaab2 to ba075b1 Compare April 3, 2020 20:18
@jklymak
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jklymak commented Apr 3, 2020

Fixed typos in commit messages, otherwise same PR as approved

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jklymak commented Apr 3, 2020

I'll self merge to hopefully make it easier for @moorepants to check if it also fixes #17004

@jklymak jklymak merged commit 98dff87 into matplotlib:master Apr 3, 2020
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lumberbot-app bot commented Apr 3, 2020

Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

  1. Checkout backport branch and update it.
$ git checkout v3.2.x
$ git pull
  1. Cherry pick the first parent branch of the this PR on top of the older branch:
$ git cherry-pick -m1 98dff875253b23f7e94611b4e2118a239792dbe8
  1. You will likely have some merge/cherry-pick conflict here, fix them and commit:
$ git commit -am 'Backport PR #17017: FIX: force blended transforms with data to be in data space'
  1. Push to a named branch :
git push YOURFORK v3.2.x:auto-backport-of-pr-17017-on-v3.2.x
  1. Create a PR against branch v3.2.x, I would have named this PR:

"Backport PR #17017 on branch v3.2.x"

And apply the correct labels and milestones.

Congratulation you did some good work ! Hopefully your backport PR will be tested by the continuous integration and merged soon!

If these instruction are inaccurate, feel free to suggest an improvement.

@ImportanceOfBeingErnest
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No, I think #17004 is caused by #13593, which apparently was a deliberate change.

jklymak added a commit to jklymak/matplotlib that referenced this pull request Apr 3, 2020
@jklymak
Merge pull request matplotlib#17017 from jklymak/fix-blended-transform
ffeeeef 
FIX: force blended transforms with data to be in data space
@jklymak jklymak mentioned this pull request Apr 3, 2020
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jklymak added a commit to jklymak/matplotlib that referenced this pull request Apr 3, 2020
@jklymak
Merge pull request matplotlib#17017 from jklymak/fix-blended-transform
cfff1bc 
FIX: force blended transforms with data to be in data space
QuLogic added a commit that referenced this pull request Apr 3, 2020
@QuLogic
Merge pull request #17020 from jklymak/backport17017
fd09e5c 
Merge pull request #17017 from jklymak/fix-blended-transform
@jklymak jklymak deleted the fix-blended-transform branch April 3, 2020 23:37
@anntzer anntzer mentioned this pull request Oct 22, 2020
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@tacaswell tacaswell tacaswell approved these changes

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Issues with autoscaling and transforms with 3.2+
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@jklymak @anntzer @tacaswell @ImportanceOfBeingErnest @QuLogic